Combined reciprocating and turbine engine installation



Z3, 1936. v s 5 C 2&455322 COMBINED RECIPROCATING AND TURBINE ENGINE INSTALLATION "Filed April 7, 1934 2 Shegts-Shet 1 INVENTOR 5mm 23, 1936. s 5. C K 2,045,322

COMBINED RECIPROCATING AND TURBINE ENGINE INSTALLATION I Filed April 7, 1934 .2 Sheets-Sheet 2 Patented June 23,. 1936 PATENT oFFIc COMBINED RECIPROCATING AND TURBINE ENGINE INSTALLATION Stanley Smith Cook, Wallsend-on-Tyne, England, assignor to The Parsons Marine Steam Turbine Company, Tyne, England Limited, Wallsend-on- Application April 7, 1934, Serial No. 719,487

In Great Britain April 11, 1933 1 Claim.

This invention relates to elastic-fluid installations comprising a reciprocating engine (hereinafter called a reciprocator) and a turbine geared together and more particularly, though peller shaft and turbine in many cases cannot be made sufficiently great to enable the turbine to be disposed alongside the reciprocator and thus undesirable longitudinal space is required for the installation.

The main object of the present invention is to provide installation lay-outs wherein this difliculty is obviated.

With such an object, the present invention consists in a power-installation comprising an elastic-fluid turbine and a reciprocator arranged alongside of each other, the power shaft of the former being coupled to the power shaft of the latter by means of reducing gearing including an idler wheel.

Referring to the accompanying drawings, which are of a diagrammatic nature:--

Figure 1 shows a plan of a form of reciprocator-turbine installation according to the present invention,

Figure 2 being a corresponding end-view.

Corresponding parts in the different figures are hausts into the turbine, B, through the pipe, 0,

the reciprocator, A, and turbine, B, being arranged alongside one another, and the turbine shaft, 2, is connected with the power shaft of the reciprocator, B, by means of a train of gears preferably of double-helical type in order to afford axial balance, this train differing from the usual double-reduction gearing, inasmuch as the turbine pinion, 4, instead of gearing direct with the primary wheel, 5, engages with an idler wheel, 9, in turn engaging with the primary wheel, 5, which, as before, is rotationally rigid with the pinion, 6, engaging the gear wheel, I, on the propeller shaft, 8. As usual in such constructions, the turbine shaft, 2, and the crankshaft, 3, are shown as geared together by doublereduction gearing comprising a pinion, 4, on the turbine shaft, gearing with the primary wheel, 5, on a lay-shaft carrying also the secondary pinion, 6, gearing with the secondary wheel, I, on the propeller shaft, 8.

With this arrangement it will be appreciated that the necessary distance, :0, between the axes of the reciprocating shaft and turbine shaft can be secured to enable the turbine, B, to be disposed alongside the reciprocator, A, as shown in Figure 1. In the embodiment illustrated in the drawings the axes of the turbine and propeller shafts, as well as those of the gears 6 and 9 occupy the same horizontal plane so that the idler gives an additional spacing between the propeller shaft axis and the turbine shaft axis equal to the pitch diameter of the idler. 'It will, of course, be appreciated that not all of these shafts may be level in a given installation and in this case the additional spacing afforded by the idler or its effective diameter for present purposes may be less than the full pitch diameter.

In addition, the length of the eduction pipe, C, is substantially reduced.

The idler-wheel drive is also useful when the power of an existing reciprocator is increased by the addition of a high-pressure turbine.

Variations may be made in detail from the constructional forms of the invention above described without exceeding the scope of the invention.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:- r

A power installation comprising an elasticfiuid reciprocating engine, a turbine receiving exhaust therefrom, said reciprocating engine and said turbine having power shafts arranged parallel to one another, a toothed wheel mounted on said reciprocating engine power shaft, a toothed pinion mounted on said turbine power shaft and intermediate shafts parallel to said power shafts carrying interengaging toothedwheel units, one of said units being an idler wheel and the other comprising relatively large and relatively small coaxial toothed wheels, one of said units engaging with said toothed wheel on said reciprocating engine power shaft and the other of said units engaging with said toothed pinion on said turbine power shaft, said turbine being arranged alongside said reciprocating engine with a clearance less than the effective diameter of said idler, said toothed wheels being of the double-helical type, said idler wheel engaging with said toothed pinion on said'turbine power shaft, and the rightand left-hand parts of said toothed wheel on said reciprocating engine power shaft being spaced apart to engage with the correspondingly spacedapart rightand left-hand parts of said relatively small toothed wheel, the rightand lefthand parts of said relatively large toothed wheel being axially juxtaposed and disposed intermediately of said spaced-apart toothed wheels.

STANLEY SMITH'COOK. 

